These will fit many European and far eastern pen manufacturers' pens. On our site, this includes Waterman, Visconti and Online but NOT Parker, Lamy or Sheaffer.
Diamine Red Ink Cartridges Universal for most pens
Dimetric DIN 5 0,5mm rapidograph Axolipse template P for dimetric illustration to DIN 5. Half ellipses become full ellipses by turning template through 180o. Scale rules at 1:1 and 1:0,5 for measuring and drawing along the main axes. Template guide edges guarantee a correct position...